Stretch Forming Process Pdf

Stretch Forming Process

Stretch Forming

Our fully programmable ton stretch former is capable of forming curved aluminum parts as long as inches. The Cyril- Bath process is used to fabricate large, relatively plane sheet shapes in small and large series, e. Stretch forming is a metal forming process in which a piece of sheet metal is stretched and bent simultaneously over a die in order to form large contoured parts.

Forming and Bending

It allows the curving of true radius contours, ellipses, compound bends, helical bends and can included straight legs. For both types of stretch formers, specifications describe the jaws, die table, and hydraulic system. The most common stretch presses are oriented vertically, in which the form die rests on a press table that can be raised into the sheet by a hydraulic ram. As the form die is driven into the sheet, which is gripped tightly at its edges, the tensile forces increase and the sheet plastically deforms into a new shape.

Secondly, the other half would go into compression, and the neutral axis would be the division between the two. Stretch formed parts are also used in household appliances and various sheet metal applications. Metal forming for industry. With some stretch forming equipment, each arm is operated by its own cylinder. Show related SlideShares at end.

Although it is a cold form of bending, heat can be introduced in the stretch forming process to allow for bending of exotic alloys. The stretch forming process subjects a metal blank to both plastic and elastic deformation. It allows the manufacture of large parts, most often made of Aluminum, with lower tooling costs than the regular drawing tools due to less run. The fine adjustment is then carried out experimentally, using an iterative method.

Stretch Forming Process - Capps Manufacturing

Now customize the name of a clipboard to store your clips. This process replaces most drop hammer forming operations and provides parts that are more stable and less susceptible to deformation from residual stresses. Stretch forming your aluminum extrusions is common for a variety of product applications. We stretch form sheet skins as well as extruded, roll formed, and press brake shapes. We can help you get started and determine what your product solution might look like.

Stretch Forming Process - Capps Manufacturing

We have the ability to form aluminum alloys, stainless steel, titanium, inconel within the limitations of machinery and material properties. Stretch Forming and Bending. Each of the four gripping segments can be operated individually, i.

This can be achieved either by linear movements or by simple curves traced by applying small discreet movements directly to the supports. It is then curved around the form block by actuating the arms, while remaining in a state of tension. Hydraulic system specifications also include minimum and maximum tension cylinder pull. Eventually the process would be pioneered for the architectural industry and opened up architects to possibilities of curved facades, architectural details and roof lines previously not possible.

Fabrication From cut-to-length, to simple punching, we can assure you that your extrusions will fit your every need. Stretch Forming Stretch forming your aluminum extrusions is common for a variety of product applications. If bending or stretch forming sounds like a viable solution for your product development challenges, please contact us.

Horizontal stretch presses mount the form die sideways on a stationary press table, while the gripping jaws pull the sheet horizontally around the form die. In this combination, bending and stretching, the outer fibers of the part being formed experience an elongation stretch sufficient enough to put this fiber into yield i. Some stretch forming equipment is used to produce aluminum parts for the automobile industry or titanium parts for aerospace applications. Later, as machines were developed and became larger and more powerful, fundamentals of biogeography pdf the technology was adapted to forming of boat and ship hulls along with various other components.

Large curved glass facades were now possible, as the process is a perfect match for the curving of large curtain-wall systems. Stretch forming is performed on a stretch press, in which a piece of sheet metal is securely gripped along its edges by gripping jaws. We have the ability to stretch form reverse forms using the bulldozer attachments to our Cyril Bath ton stretch press.

Using this process, it is possible to subject the blank to a plastic pre-strain prior to the actual forming, so that the whole cross-section of the material undergoes a uniform plastic deformation. The gripping segments are then moved towards each other so that the blank can be clamped in all four gripping jaws. From cut-to-length, to simple punching, we can assure you that your extrusions will fit your every need. If this sounds like a solution to meet your product development needs, please contact us for more information. You can change your ad preferences anytime.

Stretch Forming - Website

The counter pressing equipment is mounted on the ramming punch of the press. Software for stretch forming equipment is also available. The gripping jaws are each attached to a carriage that is pulled by pneumatic or hydraulic force to stretch the sheet. If a part were to be curved without first being stretched, two natural forces would occur during the process. The types of different bending and stretch-forming methods will deliver different results.

Stretch Form Capabilities

When the workpiece is unloaded, the plastic component of deformation is retained. The jaws then move horizontally away from each other and create a uniform plastic strain in the whole cross-section of the blank.

Why Alexandria Industries? You just clipped your first slide! It could be said that a stretch-forming machine bends parts into curved shapes, but does so while pulling the wrinkles out of the part before they can occur. First, one half of the part would naturally be stretched.

The Stretch Forming Process. First, the blank is positioned on a die table and locked into place with hydraulic holding jaws. The forces necessary for the forming are transferred through the form block to the sheet sample. Stretch forming equipment produces complex shapes by stretching a metal sheet, plate or extrusion over a form die. Projects we've helped our customers create.